well, it depends more on the drive and media than the burn speed. If you are using a good drive, with good media at rated speed, it shouldn’t matter. I know that for example, my liteon drive is capable of burning 52x CAV. It starts burning at 24 on the inside ring of the CD. Other people in these forums have determined that the quality of drives like mine would actually be lower when burning at below 24x than the would above. My theory on this is that since the lowest speed that the drive would usually write would be 24, that is the lowest speed that they bothered to optimize the drive for. It really just depends of the media more than anything though. Some media that I have found to be good for high speed (32x plus) writing is Princo, Jensen, Ritek, and Taiyo Yuden. I know that CMC is not good for high speed writing, and if you will look more on the forums, mostly the media forum, you will see that there is some brands that should be avoided alltogether. Just keep the most recent firmware update on your drive, use good media, burn it at rated speed, and if you don’t have errors, be happy.
The only time that I have had problems with the high burn speed is using the CDs in older drives, becuase as the laser makes less contact with the disc per second because of the high RPMs of the drive, the burn isn’t as deep into the disc, but I get around that little problem by using the media that I mentioned above, mainly princo.
Any more questions, please reply.